Navigation - Raytheon RayChart 620 Operation Manual

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Navigation

The Navigation display soft keys allow you to select a chart display with
either of the following:
• CDI, the Course Deviation Indicator, which shows off-course error as
the distance your vessel is from the current track
• BDI, the Bearing Deviation Indicator, which shows off-course error as
the difference between your vessel's heading and the bearing to
waypoint
When you use the DISPLAY key to select the navigation display, the
indicator you used last (CDI or BDI) is shown.
The soft key labels disappear after 7 seconds if you do not make a
selection.
The CDI or BDI data is presented in a window at the bottom right of the
screen, together with steering data, as shown in the examples below:
In CDI mode, the 10 closest waypoints are shown.
If there is no active waypoint, the message "NOT TRACKING TO
WAYPOINT" is displayed in the window.
CDI (Course Deviation Indicator)
Waypoint graphic, fixed until within 3nm
then moves down the screen
Rolling range lines at 1nm intervals
Vessel graphic
On-course indicator or direction to steer indicator
First arrow - XTE more than 0.01nm
Second arrow - XTE more than 0.05 nm
Waypoint sequence number and name, with
cross track error, bearing and range to waypoint
BDI (Bearing Deviation Indicator)
Compass
Range, updated as the vessel moves
Waypoint graphic, moves as distance and bearing
to waypoint change
On-course indicator or direction to steer indicator
Waypoint sequence number and name
Cross track error, and bearing and range to waypoint
RayChart 620
D3834-1